Allowable use determination of key species in Arak- Enjedan Rangelands.
2007
Farmahini Farahani, A`li | Mir Davudi, Hamid Reza | Borji, Mohsen | Azdu, Ziya
Overgrazing and deterioration of rangelands are the two longterm problem from the view point of water and soil conservation that cause irriversible damaging to these resources. In arid and semi arid envirinment one of the most nessessary and urgont methods for determonation of stocking rate and reduction of over grazing on rangelands is actual estimation of ranglands capacity. Therfore for this purpose the allowable use of each key species which are the dominant forage species and used by animals should be determined. In this research the species of Artemisia aucheri, Bromus tomentellus, Asperula glomerata, Buffonia sp. which are the key and most important species in Enjedan of Arak were studied. In order to determine the allowable use in Enjedan first of all ha area with suitable condition were selected and fanced and enclosed in the first year. From each species individual were selected on wich harvesting treatment incloding and background were applied (treatment for every individual). After harvesting the effect of utilization on future years were studied based on the plants root, phenological charactristics, forage yield, fresh condition,…. Result show that utilization limits of for two species of Bromus tomentellus, Asperula glomerata and for two species of Artemisia aucheri, , Buffonia sp. Is suitable. From the view point of forage quality the species of Bromus tomentellus and Asperula glomerata are the better than others and appearse tolerance ability to overgrazing and having less individual.
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